The Oura ring does a lot more analytics. There's a "sleep score", a "readiness score", various algorithms to suggest an "optimal sleep time", etc.
The Apple Watch just records stuff and throws it in the Health app. That's it. They added a "vitals" app that mostly alerts you when the numbers it records are drastically different than the norm, but it's not really analyzing or suggesting anything.
I get the feeling that Apple thought there would be a whole ecosystem of apps that would analyze your sleep data, so they didn't need to build any of it into the watch or the health app itself.
The Apple Watch just records stuff and throws it in the Health app. That's it. They added a "vitals" app that mostly alerts you when the numbers it records are drastically different than the norm, but it's not really analyzing or suggesting anything.
I get the feeling that Apple thought there would be a whole ecosystem of apps that would analyze your sleep data, so they didn't need to build any of it into the watch or the health app itself.